officials the attacks happened yesterday at a patrol base in Syria.

There were no reported injuries or damage to infrastructure.

Those rocket attacks in Syria follow strikes in Iraq carried out by the United States

in retaliation for a drone attack that injured American soldiers.

NBC News correspondent Ali Rouge reports on that from London.

So the US military has attacked Iranian-backed militant groups in Iraq hours after US personnel

were injured in a drone strike on a US air base on Tuesday morning in Iraq.

The US Defense Secretary Lloyd Austin said three sites

used by a group called Khatib Hezbollah

were hit in response to attacks on US forces in Iraq and Syria.

So who are Khadib Hezbollah?

Well, they're financed and armed by Iran

and have been one of the most prominent groups involved in attacks on US targets in Iraq

for some time now. It forms part of the Hasht al-Shabi umbrella group of

militias under Iran's patronage that's also been incorporated into the Iraqi

army. But these attacks are nothing new. The US has repeatedly targeted sites links

to militant groups in Iraq and Syria in recent years.

And depending on the political situation, these can ebb and flow considerably.

Now given what's going on in the region and the heightened

tensions the attacks have dramatically increased. Since October 17th alone there

have been over a hundred of these types of attacks by Iranian-backed militias.

So as the conflict in Gaza continues, Iran keeps issuing threats which are carried out by

...